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A heterogeneous system consisting of Pt nanoclusters on TiO 2 (001)-(1x4) surface has been investigated by scanning tunneling microscopy. It has been found that Pt forms three-dimensional clusters with a narrow size distribution and that, upon annealing in vacuum, the clusters migrate to step edges via cluster diffusion mechanism mainly along the terrace atomic rows. It has also been found...
Thermal stability of ultrathin Pt layers deposited onto TiO 2 (110)-(1xn) surface was studied by scanning tunneling microscopy in the temperature range of 300-1200 K. Besides the formation of 3D particles and the gradual sintering of the initial clusters, a unique morphological feature--one monolayer (ML) deep vacancy-islands (pits)--developed as a result of annealing above 1000 K. This appeared...
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